Microseris. COMPOSITE. 425 



awn, occasionally almost obsolete. Hymenonema ? glauciim, Hook., seems to be a 

 small form of this. Calais glauca, var. procera, Gray, Proc. Am. Acad. vii. 364. 



Along streams, common in Oregon towards the coast : Ukiah (Kellogg) ; with laciniate-pinnati- 

 fid leaves, but with narrower pappus-scales. The var. procera, on hills, Sonoma Co. to Mendocino 

 Co., &c. (Bolander, Torrcy, Kellogg) and to Klamath Co., Oregon, Cronfchite. Peduncles often 

 a foot long. Head three quarters of an inch to an inch long, especially in the variety, which has 

 it broad in proportion, and the outer scales of the involucre from 3 to 5 lines wide. Corollas 

 bright sulphur-yellow. Akenes 2 to nearly 2^ lines long when mature. 



5. M. leptosepala, Gray, 1. c. Mostly more slender than the preceding : 

 leaves similarly either entire or laciniate-pinnatifid : head smaller : scales of the 

 involucre all lanceolate (or the outermost ovate-lanceolate) and gradually acuminate : 

 pappus-scales about one fifth of the length of the more slender akene. Scorzonella 

 leptosepala, Nutt., 1. c. Calais Bolanderi, Gray, Proc. Am. Acad. vii. 365. C. 

 laciniata, Gray, 1. c. viii. 392, coll. Hall, No. 313. 



Swamps, Meudocino and Humboldt Counties (Bolandcr, Kellogg) : also in Oregon. Involucre 

 half an inch or more high, narrower than in the last, as well as the scales narrow and more taper- 

 ing ; but the outermost are sometimes rather broad. 



+- -J- Scales of the involucre all ratJier obtuse : pappus of 5 two-cleft scales, with a 

 proportionally shorter awn in the sinus : acaulescent : ligules short. 



6. M. Parryi, Gray, 1. c. Scapes a span or two high, simple : leaves linear- 

 lanceolate, laciniate-pinnatifid or entire : scales of the involucre ovate or oblong, in 

 about 3 series : awns of the pappus rather strongly denticulate, extending to only 

 twice or thrice the length of the 2-cleft scale. Calais Parryi, Gray in Pacif. R. 

 Peep. iv. 122, & Bot. Mex. Bound. 104. 



Near San Diego, Parry. Head barely half an inch high. Akenes not formed in the specimen. 

 The species was referred to the Calocalais section on account of the pappus ; but the involucre 

 refers it to Scorzonella. 



3. Pappus of 5 (or rarely fewer) scales or awns, not plumose nor barbellate, sordid: 

 akenes tapering more or less from below the truncate apex to the base: involucre 

 of mostly equal principal scales and a few short calyculate ones at base : an- 

 nuals, acaidescent, with simple scapes and small or mediocre heads. Proper 

 scales of the involucre lanceolate, and leaves either laciniate-pinnatifid or entire, 

 in all the species. EUCALAIS. (Calais Eucalais, DC.) 



% Aivns of the pappus slender, naked and fragile, and with the scale at base nearly 

 obsolete, sometimes deciduous or wanting. 



7. M. aphantocarpha, Gray, 1. c. A foot or two high, rather slender : head 

 half an inch high, many-flowered : ligules short : capillary awns of the pappus 

 barely scabrous, nearly twice the length of the akene. - Calais aphantocarpha, Gray, 

 Proc. Am. Acad. vi. 552. 



Var. tenella, Gray, 1. c. Slender, a span high, with smaller and fewer-flowered 

 heads : akenes inclining to clavate, the summit being mostly a little contracted : 

 awns of the pappus 2 to 5, with a distinct chaffy-dilated base, deciduous or very 

 fragile, sometimes apparently wanting. Calais (Aphanocalais) tenella, Gray in 

 Pacif. R. Rep. iv. 114, t. 17. 



Hills of the Contra Costa Range near Monte Diablo (Brewer), and in the same part of the State, 

 Samuels. The var. tenella, Napa Valley, in grassy places (Bigdoiv), and on the Sacramento, 

 Fitch. Akenes scabrous on the strong ribs, tapering towards the base, and the summit also slightly 

 contracted, but with no neck : the outermost pubescent, fully 2 lines long in the larger form. 

 The variety is most probably only a depauperate form of the larger. 



* * Scales of the pappus conspicuous, 

 +- From oblong-lanceolate to oblong-ovate and acute, more or less tapering into the awn. 



8. M. Bigelovii, Gray, 1. c. Scapes a span to a foot or more high : leaves 

 generally pinnately parted into numerous divisions : calyculate scales of the invo- 



